Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual competição estava em Wilderspool?
 ###Tabelas: CREATE TABLE singles:_6_3_titles_3_runner-ups (singles:_6_3_titles_3_runner-ups_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Date VARCHAR, Category VARCHAR, Surface VARCHAR, Opponent VARCHAR, Score VARCHAR) CREATE TABLE high_schools (high_schools_id AUTO_INCREMENT PRIMARY KEY, High School VARCHAR, Type VARCHAR, Established INT, Enrollment INT, Mascot VARCHAR, WIAA Classification VARCHAR, Notes VARCHAR) CREATE TABLE former_special_cities_now_core_or_designated_cities (former_special_cities_now_core_or_designated_cities_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Japanese VARCHAR, Date of designation VARCHAR, Date of reclassification VARCHAR, Region VARCHAR, Prefecture VARCHAR) CREATE TABLE teams_and_drivers (teams_and_drivers_id AUTO_INCREMENT PRIMARY KEY, Entrant VARCHAR, Constructor VARCHAR, Chassis VARCHAR, Engine VARCHAR, Tyre VARCHAR, Driver VARCHAR, Rounds VARCHAR) CREATE TABLE challenge_cup (challenge_cup_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Competition VARCHAR, Venue VARCHAR, Result VARCHAR, Score VARCHAR, Goals VARCHAR)  
SELECT Competition FROM challenge_cup WHERE Venue = wilderspool